OK, here's how it pans out so far.... Mag follower springs in the original post war Mauser Parabellum mags is/are about 40 to 50% stronger then the original pre-45 P.08 luger mag follower springs... They (Mauser Post war mag's & springs) will, & should, work in any, and all, P.08's ever made.... I'm still testing, but preliminary test seem to show that sieger is correct in that a stronger spring is far more desirable then a weak one for a high percentage function... BUT, and this is a big but..... You can't load the damn things!!!! Not even with a tool! 5 rounds, and maybe even 6 ... 7 & 8 rounds and you are for sure going to get a thumb blister! Standard MEC-GAR mags have a spring that is the same as an original mag, although my earlier testing showed that they continuely take a set and as a result eventually drag on the shell itself... but as I go on, I'm more and more impressed by the effort MEC-GAR makes in their mag... for the price, it's a great mag!! My GTHQ spring are an answer to this condition and are designed to function correctly over hundreds, if not thousands of cycles... but, only as a replacement to the original pre 1945 coil spring magazine follower springs... The Mauser Parabellum will take a bit more testing I'm afraid!
Best to all, til...lat'r...GT